Inventor
IZUMI FUTOSHI
JP42 patents
⚠️ This page may combine multiple inventors who share the name “IZUMI FUTOSHI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
FUJITSU LTD
34 patentsUS6934479B2Aug 23, 2005
Wavelength division multiplexing optical communication system and wavelength division multiplexing optical communication method
FUJITSU LTD74 citations98
US7450856B2Nov 11, 2008
Dispersion compensating method and dispersion compensating apparatus
FUJITSU LTD20 citations92
US6532102B2Mar 11, 2003
Optical amplifier
FUJITSU LTD33 citations92
US6466348B1Oct 15, 2002
Trunk apparatus of a wavelength-division-multiplexing communication system for controlling a gain of an optical amplifier provided therein
FUJITSU LTD54 citations92
US6449070B1Sep 10, 2002
Optical transmission device and wavelength-multiplexed optical transmission system
FUJITSU LTD44 citations92
US6275330B1Aug 14, 2001
Apparatus and method for controlling a wavelength-multiplex optical amplifier
FUJITSU LTD33 citations92
US7376348B2May 20, 2008
Optical communication system
FUJITSU LTD25 citations89
US7139484B2Nov 21, 2006
Signal transmission method in WDM transmission system, and WDM terminal, optical add-drop multiplexer node, and network element used in the same system
FUJITSU LTD27 citations86
US7139347B2Nov 21, 2006
Parallel signal automatic phase adjusting circuit
FUJITSU LTD19 citations84
US6864968B2Mar 8, 2005
Method of measuring wavelength dispersion amount and optical transmission system
FUJITSU LTD16 citations84
US7209661B2Apr 24, 2007
Wavelength multiplexing method and an apparatus thereof
FUJITSU LTD8 citations74
US6674567B2Jan 6, 2004
Raman excitation control method and optical transmission system using the same
FUJITSU LTD9 citations74
US9831944B2Nov 28, 2017
Probe generator, optical transmission apparatus and probe generating method
FUJITSU LTD5 citations73
US9354483B2May 31, 2016
Optical limiter, optical logic circuit, comparator, digital converter, optical transmission apparatus and optical processing method
FUJITSU LTD2 citations63
US7974799B2Jul 5, 2011
Backboard transmission method, backboard transmission apparatus, and substrate unit
FUJITSU LTD2 citations63
US7853151B2Dec 14, 2010
Optical communication system, method, and optical transmitting station
FUJITSU LTD4 citations63
US7812618B2Oct 12, 2010
Printed circuit board, and backplane data transmission method
FUJITSU LTD2 citations63
US7623791B2Nov 24, 2009
Optical signal multiplexing device and optical signal multiplexing method
FUJITSU LTD2 citations63
US7853146B2Dec 14, 2010
Optical transmission apparatus
FUJITSU LTD4 citations62
US7242865B2Jul 10, 2007
Optical communication system
FUJITSU LTD5 citations59
US7505685B2Mar 17, 2009
Wavelength-division multiplex communication system and apparatus
FUJITSU LTD2 citations58
US10268101B2Apr 23, 2019
Optical logic circuit
FUJITSU LTD0 citations52
US9866344B2Jan 9, 2018
Frequency conversion device, wavelength multiplex device and frequency conversion method
FUJITSU LTD1 citations52
US9735916B2Aug 15, 2017
Optical receiver, optical signal processing method, and optical transmission system
FUJITSU LTD1 citations52
US9490896B2Nov 8, 2016
Optical transceiver, optical transmission system, and light source output monitoring method
FUJITSU LTD1 citations52
US9306362B2Apr 5, 2016
Optical branching device, optical amplification apparatus, and optical amplification method
FUJITSU LTD0 citations52
US7920568B2Apr 5, 2011
Frame transmission apparatus
FUJITSU LTD0 citations52
US7583091B2Sep 1, 2009
Printed circuit board, and backplane data transmission method
FUJITSU LTD0 citations52
US7313327B2Dec 25, 2007
Switching control device for wavelength-division multiplexing optical signal
FUJITSU LTD0 citations52
US7627207B2Dec 1, 2009
Dispersion compensating method and dispersion compensating apparatus
FUJITSU LTD0 citations51
US7623794B2Nov 24, 2009
Wavelength division-multiplex system
FUJITSU LTD0 citations51
US8031395B2Oct 4, 2011
Optical transmission system using Raman amplifier and controlling method thereof
FUJITSU LTD0 citations42
US7725040B2May 25, 2010
Wavelength division multiplexing transmission device
FUJITSU LTD0 citations42
US7623787B2Nov 24, 2009
Wavelength division multiplexing transmission apparatus using a multiple wavelength light source
FUJITSU LTD0 citations42
IZUMI FUTOSHI
8 patentsUS8401386B2Mar 19, 2013
Optical transmission apparatus
IZUMI FUTOSHI9 citations84
US8818189B2Aug 26, 2014
Transmission-path-type specifying apparatus and transmission-path-type specifying method
IZUMI FUTOSHI5 citations73
US8958702B2Feb 17, 2015
System and method for reducing interference of a polarization multiplexed signal
IZUMI FUTOSHI3 citations62
US8682157B2Mar 25, 2014
Optical communication system, optical receiving terminal, and optical signal fault detection method
IZUMI FUTOSHI3 citations62
US8538268B2Sep 17, 2013
Optical signal demultiplexing device and optical signal demultiplexing method
IZUMI FUTOSHI2 citations62
US8265063B2Sep 11, 2012
Transmission system
IZUMI FUTOSHI3 citations62
US8515288B2Aug 20, 2013
Optical signal transmission control apparatus and optical signal transmission control method
IZUMI FUTOSHI1 citations52
US8279518B2Oct 2, 2012
Optical amplifier
IZUMI FUTOSHI0 citations41